Toy building brick



FIG. 1 is a front top isometric view of a toy building brick showing my new design;

FIG. 2 is a rear bottom isometric view of the toy building brick;

FIG. 3 is a side view of the toy building brick;

FIG. 4 is a bottom view of the toy building brick; and,

FIG. 5 is a top view of the toy building brick. 

CLAIM The ornamental design for a toy building brick, as shown and described. 